Originally Posted by
Perduellio
I think instead that this was the true origins: this civilization ended in 2500 B.C. circa...after this, probabily indoeuros migrated to the north, in the ancient North Caucasus/Volga regions, and after they widespread into all Europe and Caucasus, plus Anatolia; this would explain why legend talk about people "came from North" (doric, hittites,etc.).
Another group remained in the area and formed modern pakistani and indians indoeuropean speakers (Pashtuns, Khalas, Punjabi, etc), while others formed the proto-iranid people.